Normally moderate or large aperture telescopes are designed and constructed on a custom, limitednumber
basis. This fact alone makes acquisition of the optics a long term project. Telescopes have been
produced in volume in the past but only in relatively small apertures. Recent developments with robotic
telescopes has stimulated interest in the possibility of a Global Network of Automatic Telescopes (GNAT).
Although large volume production of most of the elements of this technology is possible, production
problems of conventional two-mirror optical designs in the 1-meter class would greatly handicap such a
venture. To meet both the needs of high-volume production and overall optical performance, a new fourmirror
optical design is required.